The Valve,safety Relief, cataloged under National Stock Number 4820-01-546-5407, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Dante Valve Company. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Dante Valve Company (CAGE 5P967) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-546-5407 |
| Primary Part Number | D40UU-04H-1/2-1/2 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Dante Valve Company |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| D40UU-04H-1/2-1/2 PRIMARY | Dante Valve Company (USA) |
| Reference | Meaning |
|---|---|
| D40UU | D/9 Drawing number reference only Danco Valve Company |
| D40 P/N D40UU-04-1/2-1/2 | 5/9 Secondary reference Danco Valve Company |
| MIL-V-22459 | 4/1 Identification reference U.S. Government activity |
| D42UU-04-1/2-1/2 | 3/9 Design control — primary reference Danco Valve Company |
NSN 4820-01-546-5407 is a Valve,safety Relief, manufactured by Dante Valve Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-546-5407 has 1 manufacturer part number on file: D40UU-04H-1/2-1/2 (Dante Valve Company).
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.